Understanding Cell Cycle and Cancer

The video explores the cell cycle, explaining how cells grow and divide, and the importance of regulation to prevent issues like cancer. It covers the phases of the cell cycle, including interphase and M phase, and the role of checkpoints and proteins in regulating the cycle. The video also discusses the G0 phase, where cells rest and do not prepare to divide.

What is the primary reason multicellular organisms grow?

• Cells divide to create more cells.

• Cells absorb more nutrients.

• Cells merge together.

• Each cell increases in size.

Why is uncontrolled cell division a concern?

• It leads to larger cells.

• It stops cell functions.

• It can result in cancer.

• It causes cells to shrink.

How do cancer treatments like chemotherapy target cancer cells?

• By merging cancer cells.

• By stopping all cell functions.

• By increasing cell size.

• By targeting cells that divide frequently.

Which phase of the cell cycle involves DNA replication?

• S phase

• G1 phase

• G2 phase

• M phase

What is the role of checkpoints in the cell cycle?

• To verify cells are ready to divide.

• To ensure cells divide continuously.

• To stop cells from growing.

• To speed up cell division.

What happens if a cell cannot pass a checkpoint due to damage?

• It stops all functions.

• It merges with another cell.

• It undergoes apoptosis.

• It continues to divide.

Which proteins are involved in the positive regulation of the cell cycle?

• Tubulin and Keratin

• p53

• Actin and Myosin

• Cyclin and Cdk

What is the role of negative regulators like p53 in the cell cycle?

• They initiate apoptosis.

• They promote cell division.

• They increase cell size.

• They replicate DNA.

What is the function of the G0 phase in the cell cycle?

• Cells perform functions without dividing.

• Cells replicate DNA.

• Cells grow in size.

• Cells prepare for division.

Why might neurons remain in the G0 phase permanently?

• They do not need to perform functions.

• They lack the resources to divide.

• They are constantly dividing.

• They do not prepare for division.